Friction clutch for telescoping elements



J. SCHADE.

rmcnow cLucH-Foa sLescomNG ELEMENTS.

Patented June 6, 1922 I 2 SHEETS-SHEET 2. Ell.. 32025 as ,Z

APPLICATION IILED APR. 2| 192|. 1,418,329.

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JOHN SCHADE, or HoLYoxr.,`MAssACi-rusnrrs, AssrGNon. To NATIONAL BLANKBooK CoMrANY, or Horizonte, MASSACHUSETTS, A VOLUNTARY TRUST'nssoCIA'rroN 0B, CorAnTNnnsnrr, HAVING As rnus'rnns, r. B. TowNE, E. s.rrowNE, J. ivf. TOWNE,

AND F. W. WILSON.'

FRICTION CLUTCH lF013, TELESCOPING ELEMENTS.

Application filed April 2,

To @ZZ whom tm/ag concern.'

Be it known that I, Jol-IN SCHADE, a citizen of the United States,residing at the city of Holyoke, county of Hampden, and State ofMassachusetts, have invented certain new and useful Improvements inFric` tion Clutches for Telescoping Elements; and Ido declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomakey and use the same.

This invention relates to certain new and useful improvements in afriction clutch for telescoping elements and it has for its primaryobject to provide an eficient and quickly releasable clutch capable ofembodiment and use in loose leaf ledgers or other structures where it isdesirable to securely lock together two elements forquick or readyrelease.

The invention consists broadly in a pair of telescopic members the malemember of which embodies a conical-headed member, an expansible clutchring movable thereover for expansion against the inner wall of thefemale member, and means for effecting movement of the ring` over theconical head.

Further, the invention resides in the features of construction and thearrangements and combinations of parts hereinafter described andclaimed, reference being made to the accompanying drawings wherein:

` Figure 1 is a longitudinal section through one form of the invention,the conical-headed member being in elevation;

Figure 2: is a similar view through another formv or embodiment of the'invention, por` tions being in elevation; f

Figure 3 is a similar view of the embodiment depicted in Figure 2 buttaken at right angles from the point of view thereof;

Figure 4 is a top plan view of the construction illustrated in Figures 2and 3';

Figure 5 is a sectional view through a loose leaf ledger of the bayonetyslotted leaf type showing the embodimentof the present inventiontherein; and p Figure 6k is a longitudinal section' therethrough on line6-6 of Figure 5.

Referring more in detail to the drawings,

and referring more particularly to the form of the invention shown inFig. 1, the nuf Specification of Letters Patent.

Patented June 6, 1922.

1921. Serial No. 458,015.

merals 1 designate a pair of separable members which itis desired toreleasably lock or ysecure together and to one of which is fixed one endof a tabular female element or sleeve 2v and to the o-ther is fixed theconical-headed stem or male element 3. The head 4 of this `latterelement flares outwardly and is encircled by an expansible' collet orclutch ring 5 which is in the nature of an endless coiled spring and isadapted to `move outwardly over the conical head 4 to expand intofrictional engagement with the inner wall of the female element. A malesleeve 6 is; slidable on the stem or shaft 8 to engage and move the ringto its operative position. The outer end of the operating sleeve 6 iscounterbored to receive a spring 7 which is compressedy therein by theshoulder or enlargement 8 on the stem 3 so as to normally' urge thesleeve to its operative position. lift or hold 9 is also formed on theoperating sleeve by which it may be retracted against the action ofthespring to render the 'clutch ring inoperative.

In the embodiment depicted in Figures 2,

3 and 4, the female element 10 isdesigned to receive the male element 11which, like the element 3, is provided with a conical head 12 that isembraced by the expansible clutch ring 13. The head is axially bored toform 'a chamber 14 in which a slian'k 15 is slidabl'e, said shankcarrying on its outer end a cup shaped cap orv hea'd'16 which isdesigned to freely fit over the head 12 andI engage the clutch ring todislodge'it from its operative position should it stick therein. Theshank jacent member 1 and o'n'opposite'sidesof the male element, andthese ears are connecte'd by a cross bearing pin 21. Rotatableiin thebearing 22 on the member 1 is an operating shaft 23 being formed on itsouter end to enter a key socket and carrying on'its inner end aneccenitrically arranged pin 24 designed to' cam against the bearing pinfA21and eect retraction of the operating sleeve which is normally urgedto its operative position by means of a leaf spring 25 that is anchoredto the supporting member 1 by screw 26 and has its free end overlyingand contacting with saidbearing pin 21.

rlhe cross pin thus forms more or less of a stirrup against the bottomof which the spring 25 bears constantly for urging the op-v eratingsleeve to its normal position so that the collet or ring will becomeoperative. The members 1 in this form comprise the covers or backs of aloose leaf ledger and the shaft 2B functions also to work the right andleft handed blocks which reside in the particular t 7pe of binder, sothatY when the shaft is turned in one direction the cam pin 2e will actagainst the pin 21 to retract the operating sleeve and when turned inthe opposite direction the cam pin will return to normally inoperative'position to permit the leaf springtoz function.

The form of clutch depicted by Figures 2, 3 and L ma. also be embodiedin the bayonet slot type of ledger as illustrated in Figures 5 and 'v6wherein the ledger-operating screw 427 is utilized to slide a wedge 28beneath the bearing pin 21 and 'exert a lifting influence thereon toretract the `operating sleeve. This wedge member .is secured to Voneofthe blocks 29 that carries one of the movable binder posts which aredrawn into the bayonet slots.

When the screw 27 is operated to draw the two movable posts 30 into theslots of the ledger as is more clearlyA described and claimed in acopending application, the

vwedge will be withdrawn from beneath the pin 21 and the male sleevewill thus be forced` by the leaf spring to cause thefirm locking of theclutch, and i 'ce versa.

l/Vhat is claimed is:

1. In a frictionclutch, a pair of telescopic elements, the male elementof which carries a conical head formed with an axial bore, an expansibleclutch ring movable over the head into engagement with the femaleelement, an operating vsleeve slidable on the male element toengage atone end the ring for movingfit outwardly over the head to operativeposition, a cap slidable over the head to engage the operative ring torelease the same, said cap having a shank slidable in the bore of thehead and connected through a slot in the latter to the sleeve wherebyupon n10-vement of the sleeve to inoperative position the cap will bemoved to operative position, and means for sliding the sleeve.

2. In a friction clutch, a pair o-f telescopic elements, the vmaleelement of which carries a conical head, an eXpansible clutch ringmovable over the head into engagement with the female element, anoperating sleeve slidable on the male element to engage at one end the.ring for moving it outwardly over the head tooperative position, and acap slidable over the head to engage the operative ring to releasey thesame, means for moving the cap to and from operative position.

3. ln a friction clutch, a pair of telescopic elements, the male elementof which carries a conical head, an eXpa-nsible clutch ring movable overthe head into engagement with the female element, an operating sleeveslidable on themale element to engage at one end the ring for moving itoutwardly over the head to operative position, a cap slidable over thehead to engage the operative ring to release the same, connectionbetween the cap and sleeve for effecting movement of one upon moving theother, the opposite end of the sleeve being formed with a pair of.spaced ea'rs, a bearing pin connecting` the same, a leaf springlbearing on the pin to urge the sleeve to one position, and means forengaging the pin to move the sleeve against the action of the spring.

ll. In a friction clutch, a pair of telescopic elements, the maleelement of which carries a conical head, an eXpansible clutch ringmovable over the head into engagement with the female element, anoperating sleeve slidafble on the male element to engage at one end thering for moving it outwardly over the head to operative position, a capslidable over the head to engage the operative ring to release the same,a connection between the cap and sleeve for effecting movement of oneupon moving the other, the opposite end of the sleeve being formed witha pair of spaced ears, .bearing pin `connecting the same, a leaf springbearing on the pin to urge the sleeve to one position, a turnableoperating member. and means movable by thelatter for moving the sleeveagainst the action of the spring.

5. In a friction clutch, a pair of telescopic elements, the male elementof which carries a conical head, an eXpansible clutch ring movable overthe head into engagement with the female element, an operating sleeveslidable on the male element to engage at one end the ring for movmg itoutwardly over the head te operative position, a cap slidable over thehead to engage the operative ring to release the same, a connectionbetween the cap and sleeve for effecting movement of one upon moving theother, the opposite end of the sleeve being formed with a pair of spacedears, a bearing pin connecting'the same, a leaf spring bearing on thepin to` urge the sleeve to one position, a turnable operating member,and a cam pin eccentrically Vcarried on the end of the latter adjacentthe bearing pinto engage the latter and effect movement of the sleeveagainst its spring.

Y 6.A In a friction clutch, a pair of telescopic i elements, the maleelement of which carries a conical head,v an expansible clutch ringmovable over the head into engagement with the female element, anoperating sleeve slidable on the male element to engage at one end thering for moving it outwardly over the head to operative position, a capslidable over the head to engage the operative ring to release the same,a connection between the cap and sleeve for effecting movement of oneupon moving the other, the opposite end of the sleeve being formed witha pair of spaced ears, a bearing pin connecting the same, a leaf springbearing on the pin to urge the sleeve to one position, a turnableoperating member, and a wedge slidable by the latter beneath the bearingpin to move the sleeve against the action of its spring.

7. In a device of the class described, a pair of connectible members, afemale element on one member, a male element on the other having aconical head, a clutch ring movable outwardly over the head intoengagement with the female element, a Vsleeve slidable on the maleelement to actuate the ring, a bearing part provided on the outer end ofthe sleeve, and means engaging said part to operate the sleeve.

8. In a device of the class described, a pair of connectible members, afemale element on one member, a male element on the other having aconical head, a clutch ring movable outwardly over the head intoengagement with the female element, a sleeve slidable on the maleelement to actuate the ring, a bearing part provided on the outer end ofthe sleeve', a spring fixed to one member for urging the sleeve to oneposition and means mounted on said member to move the sleeve against theaction of the spring.

9. ln a device of the class described, a pair of oonnectible members, afemale element on one member, a male element on the other having aconicalhead, aclutch ring movable outwardly over the head intoengagement with the female element, and means for moving the ringoutwardly and inwardly over the head.

l0. ln a friction clutch, telescopic elements7 a tapered head on themale element, an expansible clutch ring on the latter adapted to bemoved onto the head to eX- pand the ring against the female element, afollower sleeve on the male element for moving the ring, and a springmeans for moving the sleeve.

In testimony whereof I afliX my signature hereto.

JOHN SCHADE.

